The following pre/post data were collected for a rapid cycle test. The intent of the test was to reduce cycle time. Can we conclude at the 0.05 alpha level the intervention made a statistical difference? prepare down the null and alternative statements. Draw box-plots and comment on results. Data is in minutes.
Pre data - 323, 435, 242, 367, 381, 439, 420, 279
Post data - 287, 365, 125, 457, 200, 390, 154, 200